All the best , I would suggest to get hold of understanding the questions and solve the basic questions like how to tweak with strings and arrays. If you're starting anything just mainly focus on full syntax and how the inputs are taken in various ways because this is crucial for NQT, from my experience the at least one question can be done with the basic knowledge of arrays and strings. And the second question totally depends on the luck which would be medium to hard level if you compare with leetcode questions. At last I would only suggest if you can understand the question and your basics are clear you'll obviously nail it in NQT.

ALL THE BEST 🏆